#region PDFsharp - A .NET library for processing PDF
//
// Authors:
//   Stefan Lange (mailto:Stefan.Lange@pdfsharp.com)
//
// Copyright (c) 2005-2009 empira Software GmbH, Cologne (Germany)
//
// http://www.pdfsharp.com
// http://sourceforge.net/projects/pdfsharp
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
// DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.Diagnostics;
using System.Resources;
using System.Reflection;
using System.Text.RegularExpressions;
using PdfSharp.Drawing;
using PdfSharp.Pdf;

#pragma warning disable 1591

namespace PdfSharp
{
  /// <summary>
  /// The Pdf-Sharp-String-Resources.
  /// </summary>
  static class PSSR
  {
    // How to use:
    // Create a function or property for each message text, depending on how many parameters are
    // part of the message. For the beginning, type plain English text in the function or property. 
    // The use of functions is safe when a parameter must be changed. The compiler tells you all
    // places in your code that must be modified.
    // For localization, create an enum value for each function or property with the same name. Then
    // create localized message files with the enum values as messages identifiers. In the properties
    // and functions all text is replaced by Format or GetString functions with the corresponding enum value
    // as first parameter. The use of enums ensures that typing errors in message resource names are 
    // simply impossible. Use the TestResourceMessages function to ensure that each enum value has an 
    // appropriate message text.

    #region Helper functions
    /// <summary>
    /// Loads the message from the resource associated with the enum type and formats it
    /// using 'String.Format'. Because this function is intended to be used during error
    /// handling it never raises an exception.
    /// </summary>
    /// <param name="id">The type of the parameter identifies the resource
    /// and the name of the enum identifies the message in the resource.</param>
    /// <param name="args">Parameters passed through 'String.Format'.</param>
    /// <returns>The formatted message.</returns>
    public static string Format(PSMsgID id, params object[] args)
    {
      string message;
      try
      {
        message = PSSR.GetString(id);
        message = message != null ? Format(message, args) : "INTERNAL ERROR: Message not found in resources.";
        return message;
      }
      catch (Exception ex)
      {
        message = String.Format("UNEXPECTED ERROR while formatting message with ID {0}: {1}", id.ToString(), ex.ToString());
      }
      return message;
    }

    public static string Format(string format, params object[] args)
    {
      if (format == null)
        throw new ArgumentNullException("format");

      string message;
      try
      {
        message = String.Format(format, args);
      }
      catch (Exception ex)
      {
        message = String.Format("UNEXPECTED ERROR while formatting message '{0}': {1}", format, ex);
      }
      return message;
    }

    /// <summary>
    /// Gets the localized message identified by the specified DomMsgID.
    /// </summary>
    public static string GetString(PSMsgID id)
    {
      return PSSR.ResMngr.GetString(id.ToString());
    }

    #endregion

    #region General messages

    public static string IndexOutOfRange
    {
      get { return "The index is out of range."; }
    }

    public static string ListEnumCurrentOutOfRange
    {
      get { return "Enumeration out of range."; }
    }

    public static string PageIndexOutOfRange
    {
      get { return "The index of a page is out of range."; }
    }

    public static string OutlineIndexOutOfRange
    {
      get { return "The index of an outline is out of range."; }
    }

    public static string InvalidValue(int val, string name, int min, int max)
    {
      return Format("{0} is not a valid value for {1}. {1} should be greater than or equal to {2} and less than or equal to {3}.",
        val, name, min, max);
    }

    public static string ObsoleteFunktionCalled
    {
      get { return "The function is obsolete and must not be called."; }
    }

    public static string OwningDocumentRequired
    {
      get { return "The PDF object must belong to a PdfDocument, but property Document is null."; }
    }

    public static string FileNotFound(string path)
    {
      return Format("The file '{0}' does not exist.", path);
    }

    public static string FontDataReadOnly
    {
      get { return "Font data is read-only."; }
    }

    public static string ErrorReadingFontData
    {
      get { return "Error while parsing an OpenType font."; }
    }

    #endregion

    #region XGraphics specific messages

    // ----- XGraphics ----------------------------------------------------------------------------

    public static string PointArrayEmpty
    {
      get { return "The PointF array must not be empty."; }
    }

    public static string PointArrayAtLeast(int count)
    {
      return Format("The point array must contain {0} or more points.", count);
    }

    public static string NeedPenOrBrush
    {
      get { return "XPen or XBrush or both must not be null."; }
    }

    public static string CannotChangeImmutableObject(string typename)
    {
      return String.Format("You cannot change this immutable {0} object.", typename);
    }

    #endregion

    #region PDF specific messages

    // ----- PDF ----------------------------------------------------------------------------------

    public static string InvalidPdf
    {
      get { return "The file is not a valid PDF document."; }
    }

    public static string InvalidVersionNumber
    {
      get { return "Invalid version number. Valid values are 12, 13, and 14."; }
    }

    public static string CannotHandleXRefStreams
    {
      get { return "Cannot handle iref streams. The current implementation of PDFsharp cannot handle this PDF feature introduced with Acrobat 6."; }
    }

    public static string PasswordRequired
    {
      get { return "A password is required to open the PDF document."; }
    }

    public static string InvalidPassword
    {
      get { return "The specified password is invalid."; }
    }

    public static string OwnerPasswordRequired
    {
      get { return "To modify the document the owner password is required"; }
    }

    public static string UserOrOwnerPasswordRequired
    {
      get { return GetString(PSMsgID.UserOrOwnerPasswordRequired); }
      //get { return "At least a user or an owner password is required to encrypt the document."; }
    }

    public static string CannotModify
    {
      get { return "The document cannot be modified."; }
    }

    public static string NameMustStartWithSlash
    {
      //get { return GetString(PSMsgID.NameMustStartWithSlash); }
      get { return "A PDF name must start with a slash (/)."; }
    }

    public static string ImportPageNumberOutOfRange(int pageNumber, int maxPage, string path)
    {
      return String.Format("The page cannot be imported from document '{2}', because the page number is out of range. " +
        "The specified page number is {0}, but it must be in the range from 1 to {1}.", pageNumber, maxPage, path);
    }

    public static string MultiplePageInsert
    {
      get { return "The page cannot be added to this document because the document already owned this page."; }
    }

    public static string UnexpectedTokenInPdfFile
    {
      get { return "Unexpected token in PDF file. The PDF file may be corrupt. If it is not, please send us the file for service."; }
    }

    public static string InappropriateColorSpace(PdfColorMode colorMode, XColorSpace colorSpace)
    {
      string mode;
      switch (colorMode)
      {
        case PdfColorMode.Rgb:
          mode = "RGB";
          break;

        case PdfColorMode.Cmyk:
          mode = "CMYK";
          break;

        default:
          mode = "(undefined)";
          break;
      }

      string space;
      switch (colorSpace)
      {
        case XColorSpace.Rgb:
          space = "RGB";
          break;

        case XColorSpace.Cmyk:
          space = "CMYK";
          break;

        case XColorSpace.GrayScale:
          space = "grayscale";
          break;

        default:
          space = "(undefined)";
          break;
      }
      return String.Format("The document requires color mode {0}, but a color is defined using {1}. " +
        "Use only colors that match the color mode of the PDF document", mode, space);
    }

    public static string CannotGetGlyphTypeface(string fontName)
    {
      return Format("Cannot get a matching glyph typeface for font '{0}'.", fontName);
    }


    // ----- PdfParser ----------------------------------------------------------------------------

    public static string UnexpectedToken(string token)
    {
      return Format(PSMsgID.UnexpectedToken, token);
      //return Format("Token '{0}' was not expected.", token);
    }

    public static string UnknownEncryption
    {
      get { return GetString(PSMsgID.UnknownEncryption); }
      //get { return "The PDF document is protected with an encryption not supported by PDFsharp."; }
    }

    #endregion

    #region Resource manager

    /// <summary>
    /// Gets the resource manager for this module.
    /// </summary>
    public static ResourceManager ResMngr
    {
      get
      {
        if (PSSR.resmngr == null)
        {
#if true_
          // Force the English language, even on German Windows.
          System.Threading.Thread.CurrentThread.CurrentUICulture = System.Globalization.CultureInfo.InvariantCulture;
#endif
          PSSR.resmngr = new ResourceManager("PdfSharp.Resources.Messages", Assembly.GetExecutingAssembly());
        }
        return PSSR.resmngr;
      }
    }
    static ResourceManager resmngr;

    /// <summary>
    /// Writes all messages defined by PSMsgID.
    /// </summary>
    [Conditional("DEBUG")]
    public static void TestResourceMessages()
    {
#if !SILVERLIGHT
      string[] names = Enum.GetNames(typeof(PSMsgID));
      foreach (string name in names)
      {
        string message = String.Format("{0}: '{1}'", name, ResMngr.GetString(name));
        Debug.Assert(message != null);
        Debug.WriteLine(message);
      }
#else
#endif
    }

    static PSSR()
    {
      TestResourceMessages();
    }

    #endregion
  }
}